vitamins and penicillin are made from mixed acid fermentation. Other end products include hydrogen gas, propionic acid, and succinic acid.
CELLULAR RESPIRATION Most of the ATP generated by far in the various pathways of catabolism is made through what’s called oxidative phosphorylation, which is different from substrate level phosphorylation. The NADH and FADH2 made in glycolysis, the transition reaction, and the Krebs cycle will be useful in this process. Oxygen is the final electron acceptor in most cases, except in anaerobic respiration. It takes place on the inner membrane of the mitochondrion or on the inner part of the membrane in prokaryotes. The final component of respiration is the electron transport system. There are membrane complexes that participate in this process. Electrons from FADH2 and NADH get passed from component to component in the system until it reaches the endpoint, which is oxygen, which gets reduced to water. The reaction happens through cytochrome oxidase, which is different in the different organisms. These differences can help to detect the different organisms. Figure 41 shows the electron transport chain:
Figure 41.
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